Docs

Open source licences

The third-party parts Ember is built on.

Ember licence (MIT)

MIT License

Copyright (c) 2026 Ol775

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

OpenRGB (bundled with the app build)

Ember's Lights page controls PC lighting through OpenRGB, which is shipped unmodified in the OpenRGB folder next to Ember.App.exe.

• Version: 1.0 (Windows 64-bit), downloaded by scripts/fetch-openrgb.ps1 from the official release and checked against a pinned SHA-256.
• Licence: GNU General Public License v2.0 (or later). OpenRGB is a separate program: Ember starts it and talks to it over its

network SDK on this PC (127.0.0.1:6742). Ember does not link to or include OpenRGB's code. Ember itself is MIT-licensed.

• Source code and licence text: https://codeberg.org/OpenRGB/OpenRGB (release release_1.0).
• If you already run your own OpenRGB, Ember uses that one when it is listening and never starts a second copy.

Corsair iCUE SDK and CUE SDK (bundled with the app build)

To light Corsair devices Ember uses Corsair's SDK libraries, shipped unmodified in the iCUE folder next to Ember.App.exe, both taken from the redistributable folders of Corsair's official SDK releases:

• iCUESDK.x64_2019.dll, the iCUE SDK 4.0.84 (the newer interface), and
• CUESDK.x64_2019.dll, the CUE SDK 3.0.464 (the older interface, which Ember falls back to when iCUE does not accept the newer one).

• Both are downloaded by scripts/fetch-icue-sdk.ps1 from https://github.com/CorsairOfficial/cue-sdk and checked against a pinned SHA-256.
• The libraries only talk to the Corsair iCUE program on this PC, which must be running with third-party control (Enable SDK) switched on. Nothing leaves the PC.
• The SDKs are Corsair's software under Corsair's own terms (see the SDK documentation in the releases above). They are not covered by Ember's MIT licence.

Libraries used by the app and service

• LibreHardwareMonitorLib 0.9.6 (MPL-2.0): reads sensors and fan headers.
• NAudio.Wasapi 2.2.1 (MIT): listens to the sound being played, for music effects.
• Vortice.Direct3D11 and Vortice.DXGI 3.6.2 (MIT): fast screen capture for screen sync.
• Microsoft.Extensions.Hosting and related 8.x (MIT): runs the services.
• Microsoft .NET 8 Desktop Runtime (MIT, with Microsoft's installer terms): runs Ember. The installer includes Microsoft's own installer and only runs it when the runtime is missing.
• Microsoft Visual C++ Redistributable, x64 (Microsoft Software Licence Terms, shown by its installer): needed by OpenRGB. The installer includes Microsoft's own installer and only runs it when it is missing.

PawnIO driver (downloaded, not bundled)

The signed PawnIO driver lets Ember read motherboard sensors and fan headers. The Ember installer downloads PawnIO's official setup from https://github.com/namazso/PawnIO.Setup and checks its SHA-256 and signature before running it. It is not included in Ember's files because its setup program publishes no redistribution terms. PawnIO itself is published by its author under its own licence (https://github.com/namazso/PawnIO).

• Logitech G HUB (not bundled): if it is installed, Ember loads its LED SDK engine (sdk_legacy_led_x64.dll, found through G HUB's own registry entry and only if it sits under Program Files) to light Logitech G keyboards and mice. Logitech and G HUB are trademarks of Logitech; Ember is not affiliated with Logitech.

• Brand marks from Simple Icons (CC0, https://simpleicons.org): the Logitech, Corsair, Razer, Philips Hue, Elgato and TP-Link marks on the Devices page and the Steam, Epic Games, GOG, Ubisoft and EA marks on the Games page, drawn as single-colour shapes. The names and logos belong to their owners. Ember is not affiliated with them; the marks only say which integration or store a card is for. The marks for Ember itself, OpenRGB, Govee, Meross and Nanoleaf are plain shapes drawn for Ember (a flame, a ring, a lamp, a socket, three panels), not copies of those brands logos.

• Game pictures: the Games page shows the cover Steam keeps in its own local picture cache, or the icon of the game program, read from this PC. Nothing is downloaded and no game picture ships with Ember.

• Instrument Sans and JetBrains Mono (SIL Open Font License 1.1): the fonts of the redesigned beta look, bundled with the app. Instrument Sans is by Rodrigo Fuenzalida and Jordan Egstad (Instrument), JetBrains Mono by JetBrains.